<template>
  <div>
    <!--面包屑区域-->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item :to="{ path: '/goods' }">商品列表</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>

    <!--卡片区域-->
    <el-card>
      <!--信息提示区-->
      <el-alert
        title="添加商品信息"
        type="info"
        center
        :closable="false"
        show-icon>
      </el-alert>
    </el-card>
    <!--步骤区域-->
    <!--字符串减数字获取的结果是一个数字-->
    <el-steps :active="activeName - 0" align-center :space="200" finish-status="success">
      <el-step title="基本信息"></el-step>
      <el-step title="商品参数"></el-step>
      <el-step title="商品属性"></el-step>
      <el-step title="商品图片"></el-step>
      <el-step title="商品内容"></el-step>
      <el-step title="完成"></el-step>
    </el-steps>
    <el-form :model="addForm" label-position="top" :rules="addFormRules" ref="addFormRef" label-width="100px">
      <!--标签页区域-->
      <el-tabs tab-position="left"
               :before-leave="leaveTab"
               @tab-click="tabClick"
               v-model="activeName" style="height: 100%;">
        <!--基本信息-->
        <el-tab-pane label="基本信息" name="0">
          <el-form-item label="商品名称" prop="goods_name">
            <el-input v-model="addForm.goods_name"></el-input>
          </el-form-item>
          <el-form-item label="商品价格" prop="goods_price">
            <el-input v-model="addForm.goods_price" type="number"></el-input>
          </el-form-item>
          <el-form-item label="商品重量" prop="goods_weight">
            <el-input v-model="addForm.goods_weight" type="number"></el-input>
          </el-form-item>
          <el-form-item label="商品数量" prop="goods_number">
            <el-input v-model="addForm.goods_number" type="number"></el-input>
          </el-form-item>
          <el-form-item label="商品分类" prop="goods_cat">
            <el-cascader
              v-model="addForm.goods_cat"
              :options="goodsCateList"
              :props="cascaderProps"
              @change="handleCateChange"></el-cascader>
          </el-form-item>
        </el-tab-pane>
        <!--商品参数-->
        <el-tab-pane label="商品参数" name="1">
          <el-form-item v-for="item in manyTableData" :label="item.attr_name"
                        :key="item.attr_id">
            <el-checkbox-group v-model="item.attr_vals">
              <el-checkbox border v-for="(attrVal, i) in item.attr_vals" :key="i" :label="attrVal"></el-checkbox>
            </el-checkbox-group>
          </el-form-item>
        </el-tab-pane>
        <!--商品属性-->
        <el-tab-pane label="商品属性" name="2">
          <el-form-item v-for="item in onlyTableData" :label="item.attr_name"
                        :key="item.attr_id">
            <el-checkbox-group v-model="item.attr_vals">
              <el-checkbox border v-for="(attrVal, i) in item.attr_vals" :key="i" :label="attrVal"></el-checkbox>
            </el-checkbox-group>
          </el-form-item>
        </el-tab-pane>
        <!--商品图片-->
        <el-tab-pane label="商品图片" name="3">
          <el-upload
            :action="uploadUrl"
            :headers="uploadHeaders"
            :on-preview="handlePreview"
            :on-remove="handleRemove"
            :on-success="onUploadSuccess"
            list-type="picture">
            <el-button size="small" type="primary">点击上传</el-button>
          </el-upload>
        </el-tab-pane>
        <!--商品内容-->
        <el-tab-pane label="商品内容" name="4">
          <quill-editor
            v-model="addForm.goods_introduce">
          </quill-editor>
          <el-button class="addGoodsButton" type="primary" @click="addGoods">添加商品</el-button>
        </el-tab-pane>
      </el-tabs>
    </el-form>

    <el-dialog
      title="图片预览"
      :visible.sync="imgDialogVisible"
      width="50%">
      <img :src="previewUrl" alt="">
    </el-dialog>
  </div>


</template>

<script>
    import _ from 'lodash'

    export default {
        data() {
            return {
                activeName: '0',
                addForm: {
                    goods_name: '',
                    goods_price: 0,
                    goods_weight: 0,
                    goods_number: 0,
                    goods_cat: [],
                    pics: [],
                    attrs: [],
                    goods_introduce: ''
                },
                addFormRules: {
                    goods_weight: [
                        {required: true, message: '请输入商品重量', trigger: 'blur'},
                    ],
                    goods_number: [
                        {required: true, message: '请输入商品数量', trigger: 'blur'},
                    ],
                    goods_price: [
                        {required: true, message: '请输入商品价格', trigger: 'blur'},
                    ],
                    goods_name: [
                        {required: true, message: '请输入商品名称', trigger: 'blur'},
                    ],
                },
                goodsCateList: [],
                cascaderProps: {
                    expandTrigger: 'hover',
                    value: 'cat_id',
                    label: 'cat_name',
                    children: 'children'
                },
                manyTableData: [],
                onlyTableData: [],
                uploadUrl: 'http://timemeetyou.com:8889/api/private/v1/upload',
                imgDialogVisible: false,
                previewUrl: ''
            }
        },
        computed: {
            goods_cat_id() {
                if (this.addForm.goods_cat.length === 3) {
                    return this.addForm.goods_cat[2]
                }
                return ''
            },
            uploadHeaders() {
                return {
                    Authorization: window.sessionStorage.getItem('token')
                }
            }
        },
        created() {
            this.getGoodsCateList()
        },
        methods: {
            async getGoodsCateList() {
                const {data: res} = await this.$http.get('/categories')
                if (res.meta.status !== 200) {
                    return this.$message.error(res.meta.msg)
                }
                this.goodsCateList = res.data
                console.log(this.goodsCateList)
            },
            handleCateChange() {
                if (this.addForm.goods_cat.length !== 3) {
                    this.addForm.goods_cat = []
                }
            },
            leaveTab(activeName, oldActiveName) {
                if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
                    this.$message.error('请选择商品分类')
                    return false
                }
            },
            async tabClick() {
                if (this.activeName === '1') {
                    const {data: res} = await this.$http.get(`categories/${this.goods_cat_id}/attributes`, {
                        params: {
                            sel: 'many'
                        }
                    })
                    if (res.meta.status !== 200) {
                        return this.$message.error('获取动态参数失败')
                    }
                    res.data.forEach(attr => {
                        attr.attr_vals = attr.attr_vals.length > 0 ? attr.attr_vals.split(' ') : []
                    })
                    this.manyTableData = res.data
                    console.log(this.manyTableData)
                } else if (this.activeName === '2') {
                    const {data: res} = await this.$http.get(`categories/${this.goods_cat_id}/attributes`, {
                        params: {
                            sel: 'only'
                        }
                    })
                    if (res.meta.status !== 200) {
                        return this.$message.error('获取静态参数失败')
                    }
                    res.data.forEach(attr => {
                        attr.attr_vals = attr.attr_vals.length > 0 ? attr.attr_vals.split(' ') : []
                    })
                    this.onlyTableData = res.data
                    console.log(this.manyTableData)
                }
            },
            // 预览图片回调
            handlePreview(file) {
                // console.log('预览图片');
                // console.log(file);
                this.imgDialogVisible = true
                this.previewUrl = file.response.data.url
            },
            // 删除图片回调
            handleRemove(file, fileList) {
                let removePath = file.response.data.tmp_path
                let i = this.addForm.pics.findIndex(picInfo => picInfo.pic === removePath)
                this.addForm.pics.splice(i, 1)
                console.log(this.addForm)
                // console.log('file')
                // console.log(file);
                // console.log('fileList')
                // console.log(fileList);
            },
            // 图片上传成功回调
            onUploadSuccess(response, file, fileList) {
                // console.log('response: ')
                // console.log(response);
                // console.log('file: ')
                // console.log(file);
                // console.log('fileList: ')
                // console.log(fileList);
                this.addForm.pics.push({
                    pic: response.data.tmp_path
                })
                console.log(this.addForm)
            },
            addGoods() {
                this.$refs.addFormRef.validate(async valid => {
                    if (!valid) {
                        return this.$message.error('数据校验不通过')
                    }
                    this.manyTableData.forEach(item => {
                        let attrInfo = {
                            attr_id: item.attr_id,
                            attr_value: item.attr_vals.join(' ')
                        }
                        this.addForm.attrs.push(attrInfo)
                    })
                    this.onlyTableData.forEach(item => {
                        let attrInfo = {
                            attr_id: item.attr_id,
                            attr_value: item.attr_vals
                        }
                        this.addForm.attrs.push(attrInfo)
                    })
                    let form = _.cloneDeep(this.addForm)
                    form.goods_cat = this.addForm.goods_cat.join(',')
                    console.log(form)
                    const {data: res} = await this.$http.post('goods', form)
                    // if (res.meta.status !== 201) {
                    //     return this.$message.error(res.meta.msg)
                    // }
                    this.$message.success('添加成功')
                    this.$router.push('/goods')
                })

            }
        }
    }
</script>

<style scoped>
  .el-steps {
    margin: 15px;
  }
  .addGoodsButton {
    margin-top: 15px;
  }
</style>
